diff --git a/README.rst b/README.rst
index 110816f..9ca2e14 100644
--- a/README.rst
+++ b/README.rst
@@ -4,13 +4,13 @@ TDDBC for Python with Pytest
 
 これは、TDDBCのPythonista向け Pytest_ プロジェクトです
 
-.. _Pytest: http://pytest.org/latest-ja/
+.. _Pytest: https://docs.pytest.org/
 
 動作確認環境
 ============
 
-- Python 3.8.5
-- pytest 6.2.4
+- Python 3.12.4
+- pytest 8.2.2
 
 ※Python2は2020年1月にサポート終了(EOL)していますので、Python3をご利用ください。
 
@@ -34,18 +34,19 @@ TDDBC for Python with Pytest
    ...
    
    # Output sample
-   ============================= test session starts ==============================
-   platform linux -- Python 3.8.5, pytest-6.2.4, py-1.10.0, pluggy-0.13.1 -- /usr/bin/python3
+   ====================================== test session starts ======================================
+   platform linux -- Python 3.12.4, pytest-8.2.2, pluggy-1.5.0 -- /usr/local/bin/python
    cachedir: .pytest_cache
-   rootdir: /root/work/python_pytest, configfile: setup.cfg
-   plugins: forked-1.3.0, cov-2.11.1, xdist-2.2.1
+   rootdir: /root/python_pytest
+   configfile: setup.cfg
+   plugins: cov-5.0.0, xdist-3.6.1
    collected 3 items
    
-   tests/acme/test_snake.py::TestPython::test_be_out_of_question PASSED     [ 33%]
-   tests/acme/test_snake.py::TestMontyPython::test_say_name[Monty Python] PASSED [ 66%]
-   tests/acme/test_snake.py::TestMontyPython::test_say_name[John Smith] PASSED [100%]
-   
-   ============================== 3 passed in 0.04s ===============================
+   tests/acme/test_snake.py::TestPython::test_be_out_of_question PASSED                      [ 33%]
+   tests/acme/test_snake.py::TestMontyPython::test_say_name[Monty Python] PASSED             [ 66%]
+   tests/acme/test_snake.py::TestMontyPython::test_say_name[John Smith] PASSED               [100%]
+    
+   ======================================= 3 passed in 0.02s =======================================
 
 のように正常終了すればOKです
 
diff --git a/acme/snake.py b/acme/snake.py
index 0a3f04a..57ba69b 100644
--- a/acme/snake.py
+++ b/acme/snake.py
@@ -1,13 +1,18 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-from random import randint
 
+def ultimate_answer() -> int:
+    return 42
 
-class Python(object):
-    def say(self, greeting=None):
-        return 'Hiss!' * randint(1, 9)
+
+class Python:
+    def say(self) -> str:
+        return 'Hiss!'
 
 
 class MontyPython(Python):
-    def say(self, greeting):
-        return 'Hello %s' % greeting
+    def __init__(self, name: str):
+        self.name = name
+
+    def say(self) -> str:
+        return f'Hello {self.name}'
diff --git a/requirements.txt b/requirements.txt
index 8f8cbf6..bdf8454 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,14 +1,18 @@
 -e .
-appdirs==1.4.4
-cov-core==1.15.0
-coverage==5.5
-distlib==0.3.1
-execnet==1.8.0
-filelock==3.0.12
-iniconfig==1.1.1
-py==1.10.0
-pytest-cov==2.11.1
-pytest-xdist==2.2.1
-pytest==6.2.4
-tox==3.23.1
-virtualenv==20.4.6
+cachetools==5.3.3
+chardet==5.2.0
+colorama==0.4.6
+coverage==7.5.4
+distlib==0.3.8
+execnet==2.1.1
+filelock==3.15.4
+iniconfig==2.0.0
+packaging==24.1
+platformdirs==4.2.2
+pluggy==1.5.0
+pyproject-api==1.7.1
+pytest==8.2.2
+pytest-cov==5.0.0
+pytest-xdist==3.6.1
+tox==4.16.0
+virtualenv==20.26.3
diff --git a/tests/acme/test_snake.py b/tests/acme/test_snake.py
index 33a20d8..d3956a2 100644
--- a/tests/acme/test_snake.py
+++ b/tests/acme/test_snake.py
@@ -5,39 +5,37 @@
 サンプルテスト
 """
 
-import re
+import pytest
 
+from acme.snake import ultimate_answer, Python, MontyPython
 
-def pytest_generate_tests(metafunc):
-    """
-    Parametrizing test methods through per-class configuration
-    http://pytest.org/latest-ja/example/parametrize.html#id5
-    """
-    try:
-        funcarglist = metafunc.cls.params[metafunc.function.__name__]
-    except AttributeError:
-        return
-    argnames = list(funcarglist[0])
-    metafunc.parametrize(
-        argnames,
-        [[funcargs[name] for name in argnames] for funcargs in funcarglist]
-    )
+
+def test_ultimate_answer():
+    assert ultimate_answer() == 42
 
 
 class TestPython:
-    def test_be_out_of_question(self):
-        from acme.snake import Python
-        assert re.match(r'^(Hiss\!)+$', Python().say()), 'シャー'
+    def test_say(self):
+        # Arrange
+        # sut = System Under Test
+        sut = Python()
+        # Act
+        actual = sut.say()
+        # Assert
+        assert actual == 'Hiss!'
 
 
 class TestMontyPython:
-    params = {
-        'test_say_name': [
-            dict(name='Monty Python'),
-            dict(name='John Smith'),
-        ],
-    }
-
-    def test_say_name(self, name):
-        from acme.snake import MontyPython
-        assert MontyPython().say(name) == 'Hello ' + name
+    @pytest.mark.parametrize(
+        'name, expected',
+        [
+            ('Monty Python', 'Hello Monty Python'),
+            ('John Smith', 'Hello John Smith'),
+        ])
+    def test_say_name(self, name, expected):
+        # Arrange
+        sut = MontyPython(name)
+        # Act
+        actual = sut.say()
+        # Assert
+        assert actual == expected